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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Kamal Heib <kamalheib1@gmail.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 106/242] RDMA/cxgb4: Validate the number of CQEs
Date:   Mon, 28 Dec 2020 13:48:31 +0100
Message-Id: <20201228124909.913851885@linuxfoundation.org>
In-Reply-To: <20201228124904.654293249@linuxfoundation.org>
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From: Kamal Heib <kamalheib1@gmail.com>

[ Upstream commit 6d8285e604e0221b67bd5db736921b7ddce37d00 ]

Before create CQ, make sure that the requested number of CQEs is in the
supported range.

Fixes: cfdda9d76436 ("RDMA/cxgb4: Add driver for Chelsio T4 RNIC")
Link: https://lore.kernel.org/r/20201108132007.67537-1-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/infiniband/hw/cxgb4/cq.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -906,6 +906,9 @@ struct ib_cq *c4iw_create_cq(struct ib_d
 
 	rhp = to_c4iw_dev(ibdev);
 
+	if (entries < 1 || entries > ibdev->attrs.max_cqe)
+		return ERR_PTR(-EINVAL);
+
 	if (vector >= rhp->rdev.lldi.nciq)
 		return ERR_PTR(-EINVAL);